Answer:
-diffusion
Step-by-step explanation:
Cells are usually surrounded by a bilipid layer called a plasma membrane. The membrane maintains selective permeability through the use of its transport proteins, pores and gated channels. Simple diffusion happens, as a method of passive transport, in cells through plasma membranes. The solutes travel through the plasma membrane in the process of diffusion from regions of high concentration to regions of low concentration; this occurs without the use of energy.
The solutes move in a specific direction down their concentration gradient. Here, glucose moves out of the cell through facilitated diffusion, a form of passive transport using carrier proteins. The other molecules (1 and ) enter the cell across the membrane through simple diffusion due to their low molecular weight- these may move across the membrane at will, or use transport proteins.